The Effect Of Trng; Tstep Controls Smoothness - HP 39g Master Manual

The effect of TRng

The X and Y ranges control the lengths of the axes. They determine how
much of the function, when drawn, that you will be able to see. For
example...
Notice that in both cases,
ordered pair giving (X,Y). Unlike XRng & YRng, the effect of TRng is to
decide how much of the graph is drawn at all, not how much is displayed of
the total picture.
For example...
above, changing the T range from
appears only partially drawn. What constitutes "fully drawn" depends, of
course, on the function used.

TStep controls smoothness

The value of the parameter TStep controls the
jump between successive values of T when
evaluating the function for graphing. Any
graph is always a series of straight lines, and
making TStep too large produces a graph
which is not smooth. The example on the right
shows TStep = 0.5 instead of 0.05.
gives a graph of:
whereas..
gives a graph of:
is on and shows the T value, followed by an
gives a graph of:
As you can see
π
≤ ≤
to
0 t 2
101
t ≤ ≤
gives a graph that
0 5